Hot-blast stove.



T. E. THOMAS.

HOT BLAST STOVE.

APPLIUATIOH FILED JULY 3,1909. 953,,55%@ Patented Mar.29,1910.

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T. E. THOMAS.

HOT BLAST STOVE.

APILIOATION FILED JULY 3,1909.

Patented Mar. 29, 1910.

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T. E. THOMAS.

HOT BLAST STOVE.

APPLICATION FILED JULY (1909.

Patented Mar. 29, 1910.

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HGT-BLAST S'iQVE.

T 0 all whom it may concern:

Be it known that I, TI-IoMAs E. Thomas, of Niles, in the county of Trumbull and State of Ohio, have invented certain new and useful Improvements in Hot Blast Stoves; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The object of this invention is to so construct hot-blast stoves as to insure uniformity in the heating thereof by equalizing the dissemination of the heat from the gas port, and likewise to equally distribute the cold blast throughout the stove.

The invention will be hereinafter fully set forth and particularly pointed out in the claims.

In the accompanying drawings, Figure l is a vertical longitudinal sectional view, with parts broken away. Fig. 2 is a vertical. section on line 22, Fig. 1, with parts broken away. Fig. 3 is a horizontal sectional view on line 33, Fig. 2. Fig. 4 is a vertical sectional view of a slight modification. Fig. 5 is a sectional view on line 55, Fig. i.

In the drawings I have shown two pass stove having a central verticallydisposed combustion chamber 1, and an annular flange 2 of ordinary construction wherein may be located known forms of partitions and checker work, if desired. Into the lower end of the combustion chamber opens the gas burner port 3, the entrance to which is controlled by a valve l, and from such end of the chamber leads a hotblast port 5 having a controlling valve (3.

7 is a chamber which is located directly beneath the combustion chamber, and in its circular wall 8 are formed ports 9, see Fig. 3. There may be any desired number of ports, but four are preferred. lhe roof of this chamber is preferably a ched, and the wall 8 is circular in horizontal section and concentric with the inclosing wall of the stove, the annular flue 2 being bet een the two walls. .l have shown the chimney outlet 10 as having a valve 12, and the cold blast inlet 18 as having a valve In Figs. 1, 2 and 3, the cold blast inlet 13 and the chimney outlet 10 are shown as located beneath the stove and leading radially from a central throat 15 depending from the bottom of chamber 7. This throat opens Specification of Letters Patent.

Application filed July 3, 1909.

l i l l i l I l l l l i l Patented 2% Edith Serial No. 505,913.

centrally into the chamber 7 so that the coldblast by entering the chamber at its center may be distributed equally to the surround ing annular chamber through the plurality of openings in wall 8, and likewise when the stove is under gas with the chimney valve open the down draft will be equal throughout the annular chamber. The in vention is not confined, however, to the described arrangement, since, shown in Figs. 4t and 5, the cold-blast inlet 13 and the Cl1l111- ney outlet 10 may be brought into the stove above the bottom thereof so as to open into chamber at opposite points near the roof thereof, but in this arrangement the ports 21 which. form communications between the central chamber and the annular line 2 are in the bottom of the surrounding wall 8. in this arrangement, however, I still maintain the same advantages arising from equally disseminating the heat and equally distributing the cold-blast.

in practice, with the valve 4; of the gas burner port open, and the valve of the chimney outlet port likewise open, the gas enter ing the combustion chamber will rise through the latter to the dome-like top of the stove and descend evenly tn. ugh the annular fine 2 and thence pass into the central chamber 7 or 7 and out through the chimney out-let. The draft of the latter in sures the even and thorough heating of the stove, since the gases are all drawn evenly down through flue 2 and thence into the central chamber. After the stove ha been thoroughly heated, the chimney outlet valve 12 is closed, as is also the gas burner port valve -l-, while the valve 14: of the cold blast port and the valve 6 of the hot blast port are opened. The cold air being introduced directly into the central chamber will be dis tributed equally into the annular flue wherein it will rise to the top of the stove and then pass down through the combustion chamber and out through the hot blast port 5.

The advantages of my invention will be apparent to those skilled in the art. it will be seen that all danger of uneven heating of the stove is avoided, since the draft from the chimney outlet act-s evenly upon the lower end of the annular flue and cannot draw more strongly from one side of the stove than from the other. Likewise the same advantage is obtained in respect to the cold blast which will pass in equal pro port-ions through the several ports of the central receiving and distributing chamber into the annular flue.

I claim as my invention 1* 1. A hot blast stove having a centrallyarranged combustion chamber, an annular flue surrounding said chamber and extend ing downward beyond the lower end thereof, a gas inlet opening into, and a hot blast outlet leading from, said combustion chamher, a chamber located centrally beneath said combustion chamber and opening radially at a plurality of points into said annular flue by which it is surrounded, a chimney outlet leading from, and a cold blast inlet opening into, said chamber the inner ends of said chimney outlet and cold blast inlet eing out of direct line with the openings between the central chamber and the annular flue.

2. A hot blast stove having a centrallyarranged combustion chamber, an annular lue surrounding said chamber and extending downward beyond the lower end thereof, a gas inlet opening into, and a hot blast outlet leading from, said combustion chamber, an annular wall forming a chamber centrally beneath said combustion chamber and having a plurality of openings into said annular flue by which it is surrounded, a chimney outlet leading from, and a cold blast inlet opening into, said chamber the inner ends of said chimney outlet and cold blast inlet being out of direct line with the openings between the central chamber and the annular flue.

A hot blast stove having a centrallyarranged combustion chamber, an annular flue surrounding said chamber and extending downward beyond the lower end thereof, a gas inlet opening into, and a hot blast outlet leading from, said combustion chamber, a chamber located centrally beneath said combustion chamber and opening radially into said annular flue by which it is sourrounded, said latter chamber having a throat at the center of its bottom, a cold blast inlet opening into, and a chimney outlet leading t'rom, said throat.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

THOMAS E. Tll lillwlAS.

lVitnesses P. J. SHEEHAN, H. V. BATGHELLER. 

